Improvement in machines for cutting paper



.L. P. COHEN. M'achin'for Cutting Paper.

No. 205,527. Patented July 2,1878.

Fig." J

-FETERS. PHOTO-LI'IHOGRAPHER, WASH NGTON. D Q

UNITED STATES PATENT OFFICE.

LOUIS P. COHEN, OF NEW YORK, N. Y., ASSIGNOR TO JACOB COHEN, OF

SAME PLACE.

IMPROVEMENT IN MACHINES FOR CUTTING PAPER.

Specification forming part ofLetters Patent No. 205,527, dated July 2,1878; application filed November 10, 1877.

To all whom it may concern:

Be it known that I, LOUIS P. COHEN, of the city of New York, in thecounty and State of New York, have invented certain new and usefulImprovements in Machines for Guttin g Paper Rolls; and I hereby declarethe following to be a full, clear, and exact descriptionthereof,reference being had to the accompanying drawing, forming a part of thisspecification.

My said invention relates to improvements in a certain machine forcutting roll-paper invented by myself and one Ignatz Frank, anddescribed in the specification of Letters Patent No. 167 ,645 and theobject of mysaid improvements is to render the said machine more perfectand eihcient in its operation by means of an improved construction andarrangement of the revolving knife and the appliances for clamping thepaper or other material to be cut, and feeding the same to the knife.

My said improvements consist in constructing the knife in circular form,and in the means employed for causing the same to gradually approachnearer the center of the roll as it is revolved; also, in improved meansfor clamping the paper roll, and for holding the rear end of the same,so that there shall be no displacement by the pressure of the knife;also, in a novel device for preventing the binding of the knife withinthe cut, all of which is hereinafter particularly set forth.

In the accompanying drawing, Figure 1 represents a plan view of myimproved machine; Fig. 2, an elevation of one side of the same; Fig. 3,a front elevation; Fig. 4, a vertical transverse section on the line anac,- Fig. 5, a vertical transverse section of the cutter-head andstationary clamping-standard, and Fig. 6 a detail View, hereinafterexplained. The three last-named figures are drawn to a larger scale thanthe others.

Similar letters of reference indicate the same parts in all the figures.

A represents the base or bed plate of the machine, which may be securedupon a frame or platform of suitable form and construction.

B is a stationary clamping standard, attached to the cutter-head Cat oneend of the machine.

tobe cut oif, the extent of each forward movement being determined andregulated by means of any suitable gage, E, or by a ratchet movement.

F is the knife, which is of circular form, and is secured by means of abolt and screwnut to a curved bar, G, which latter is pivoted to arim-wheel, b, at its forward end,

(which has an elongated slot in which the pivot-pin works,) while therear end of the said bar is pivoted to another rim-wheel, 0. These twowheels I) and c are driven by suitable gear-wheels d d d d through themedium of the drivingshaft H, so that they both revolve in the samedirection, but at difieren't rates of speed, the outer wheel 1) makingmore revolutions per minute than the wheel 0, and thereby causing theknife F to approach gradually nearer to the center of the roll held bythe clamping-shells e as the said knife revolves around the said roll.

By means of the peculiar construction and movement of the knife, asabove described, a perfectly clean cut is made, and any tearing orjagging of the edges is effectually obviated; and another advantagesecured by this construction of the knife is that it can be used muchlonger without being sharpened, for the reason that, as it isrigidlyfixed by the screwnut to the bar G, only a small portion of itsperiphery is brought into contact with the paper, and when that part ofthe' edge has become dulled, it can be shifted so as to bring a freshportion of the edge into action, and so on, until each part of theperiphery has in its turn been brought into use successively.

The wheel b has bearings upon flanges on the Wheel 0, While the latterhas bearings upon a flange formed on the standard B, substantially asshown in Fig. 5; but I do not wish to be understood as confining myselfto the exact construction therein shown, the object being to impart tothe two ends of the bar G the unequal rates of speed above mentioned, soas to gradually bring the knife nearer to the center of the roll as thesaid knife revolves around the same.

The clamping standards B and D are substantially similar inconstruction, except that the former is stationary and the lattermovable, and that with the latter is combined a device, hereinafterdescribed, for keeping the rear end of the roll in proper position as itis being operated upon by the knife.

The clamping-shells e and e are provided with stems, which slide incorresponding grooves in the standard, and which have horizontal pins ff f f at their upper ends, which are operated by eccentric-cam pieces hh on the loose ring-plates i t" of the standards, so that the whole ofthe said clamping-shells are adjusted simultaneously to clamp or releasethe roll, such adjustment being effected by means of a worm and segmentgear, a n, and hand-wheel m on.

K represents my improved device for holding the rear end of the roll tobe cut, in which 1) are fingers standing lengthwise of the machine, andwhich are inserted into the usual opening at the center of the roll. Atthe rear end of each finger is a stem, which slides in a correspondinggroove in a disk-plate, T, which is supported by a bracket attached tothe standard D. On the said bracket is also a cylindrical sleeve,provided with screw-threads on its interior surface, which receives ascrewrod, 8, at the rear end of which is a handwheel for operating thesame, and the front end of which passes centrally between the fingers pand is cone-shaped, so that, when the said rod is projected by turningthe handwheel, the said fingers are spread apart and bear firmly againstthe interior of the opening at the center of the roll. The rear end ofthe roll rests against the disk-plate r, so that, by the joint action ofthe latter and the said fingers, all possibility of displacement byreason of the pressure of the knife is effectually prevented. Thisdevice is shown most plainly in Fig. 6, which represents a verticallongitudinal section of the same.

For the purpose of clearing the knife and preventing its binding in thecut, I employ a plate, L, which gradually tapers to a thin edge, which Isecure to the bar Gr alongside of the knife and outside of the same,with its thin edge toward the edge of the knife, so that, when the saidplate is carried around with the bar and the knife, it pushes the cutpaper away from the knife and prevents it binding within the cut.

A wooden plug is inserted in the opening at the outer end of the roll,as shown at u, Fig. 3, so that the inner folds of the roll are keptproperly to the knife.

By means of the devices above described the paper may be out with theutmost precision and uniformity of width. The out comes off in conicalform, and is afterward flattened by laying it on a table or board andstriking it with a mallet or similar instrument.

Having thus described my improvements, what I claim as my inventionis 1. In a machine for cutting paper and similar material from a rollinto disk-shaped lengths, a circular knife mounted upon a bar which iscaused to revolve around the roll by suitable mechanism, substantiallyas described, so that the foremost end of the said bar shall revolvearound the common center more rapidly than its rear end, as and for thepurposes set forth.

2. The combination of the circular knife F, mounted upon a curved bar,G, the wheels b and a, carrying the said bar and rotated at differentrates of speed by suitable mechanism, and the clearing-plate L, as andfor the purpose set forth.

3. The clamping device herein described, consisting of the combinationof the clamping-shells e 6, having stems which slide in the grooves inthe standard, the ring 1' provided with cam-pieces h and pins f, theworm and segment gearing n, the fingers p, the grooved disk-plate r, andthe conical adjusting-rod s,

substantially as shown and described.

LOUIS P. COHEN.

YVitnesses:

JOHN S. THORNTON, JACOB COHEN.

